Cold air inlet boot for air-heating furnaces



July 26, 1949. JONES 2,477,254

COLD AIR INLE'I.BOOT FOR AIR HEATING FURNACES Filed June 26, 1946 INVENTOR. War/0x7 fl M0065 BYWQQGAX.

Patented July 26, 1949 1;

COLD AIR INLET' BOOT FQR FURNACES Merton 1).. Jones. Kalamazoo, Mich assignor to. fieitlamazoo Steve. 42. Furnace Q0... Kalamazo Application .iunezzs, 194a. Serial: No. stassz 11 (01.- 126-92) 1 V p This. invention; relates to improvements in cold.

inlet boot for air heating; furnaces. The principal objects of this. invention are: I First, to provide a cold air boot for a, furnace furnace without the aid of a skilledsheet metal:

worker.

Second, to provide acoldaair boot for a the. at-s which wi11. present a sloping surfaces-for tachment of coldairducts thereto; 1

'I-hird, to provide a cold. airbootfor a furnace with novel attaching. flanges: requiring less bolt-s; thanboots used heretofore. Fourth, to provide a boot which will keep; the: cold air separated from the furnace casin until the air actually enters the furnace. Objects relating todetails and economies; of the invention will. appear from the description to follow. The invention isdefined and; pointed: out. in the claims. I p I The drawings of which there is one sheet Show a preferred form of theinvention.

Fig. 1 represents an elevational'view partially broken away, of a furnace having'two cold air boots embodying the invention attached thereto. Fig, 2 represents across-sectional view taken along the line 2-2 in Fig. 1-.

Fig. 3 represents a perspective cross-sectional view showing the 'joint between the end wall and top of the boot.

Fig. 4 represents'an exploded perspective 'view' showing the various members of the boot.

The drawings illustrate a-furnace l havingja sheet metal casing 2 to which the cold air ducts 3 are attached by the boots g'enerallyindica'ted at. 4. Apertures 5 are provided in'the casin for the passage of cold air into the bottom 0 the. casing. e y

The boot 4 consists of flat end walls *6 having outwardly flanged ends I defining'bolt; holes for attaching. the boot to. the casing. The.top, bottom, side and sloping edges of the end'walls are formed with inwardly turned flanges 8.

The body of the boot consists of a Gb tinuous. strip of sheet metal bent to form a top 9, bottom l0, side I i andupper and-lower sloping walls t2 and.l3. The upper sloping wall defines an upwardly flanged hole [4 to which the all ducts 3 are connected. The ends of'the body of the boot are folded into return bend flanges which are offset inwardly of the body of the boot and out-turned edges [6 substantially in-the-planes' of the body so as to define slotsbetween the edge and the returnbend flanges along the edges of theliodlv arran ed. to receive, the flanges son the ends of the. boot. The. upper. and lower ends; i the boot are slit into a series. otiinsers' l tenninatin in the body or the boot al ng. arcuate linesaof agradiusequal t the.. radius of thefurlnace casing.

A. baffle Isis provided with downtumed'flan es lilwhich are. bolted to the endplates, 5 so that the upper ed e of. the. baflle abuts against. the. junction. of. the top and uppersloping sections or thebody of the boot. he lower end of, the: baflie-isslit into; aseries cinn erszll terminating along.v an ellipticalline .inithebody of the battle...

In assembling the boot, the. flange on one end. platermay. beslid into the..slot on oneend j'qfg thebody anioneside of the baflie may be bolted to that endiplate. -Thenextendin edge l5 oi the body may then, be. bent over the side. of the, end plate. to hold it in. place. and the other end plate similarly attached. The, upper fingers i! "may then be bent downwardly and the, lower. fingers ilbentdownwardly in. an arcuate surface and the boot-may ble bolted to the side of the lasing with. the upper fingers. outside and'the lower. fingers. ll inside the. opening 5. It will e noted that theends of the end flanges 15 are cut away as at 2| so that the flanges 1 on the end walls. willfitflush against the casing. "The fingers 2.0, on the bafiie may then. bebent upwardl n the inside of the-.oasingto complete the boot sti leture. a "I The baille [8 serves .to direct'the cold. air t6 theopeningilwithout formin ed y currentsin the bootand also leaves a dead air space along the,.upper part of the boot so that there. will be no. heating of the air. in he boot to hi e 'the. natural draft circulation through the .cold air fiuesandthe casing of the furnace. 1

The parts of the boot may be inexpensively formed from sheet metal and several of thebody sections may conveniently be nested together for econoinicali shipment. Installationv of the bbbt does not require any cutting and fitting ofpartssuch as would require the services of an expert sheet metal worker. v The invention has been illustrated [and describedin an embodiment: which has been found highlysatisfactory. No attempt has been made to-show other. possible adaptations, as itis believed'that this disclosure will enable those skilled in'theart to adaptthe invention as may be desired. Having thus describedmy invention, what"! claim as new and'desire-to secure by LettersPatentis:- Y

FlgC 1 tachment to the sideof the casing and having.

complementary opposed flanges on' their other edges, said end walls being disposed with their corresponding edges in parallel relationship and with said opposed flanges facinginwaidly toward each other, an integral poly-paneled side wall member including top and bottom panels and intermediate panels, there being an'outwardly and' downwardly inclined panel adjacent the top panel and provided with a flanged conduit opening, said side wall member corresponding in shape to the outer edges of said end walls and having inset;

return bend seam elements on its end edges pro viding laterally facing slots receiving the opposed flanges of, said end Walls'said seam elements of said side wall member terminating inlaterally projecting flanges foldable upon the exterior sides of said end walls, the top panel of said side wall, member having a flange at its inner edge abutting the side of the casing in substantially spaced relation to the upper edge of the casing opening, the bottom panel havinga doWn-turned'fiange atits inner edgelengaged within the casing at the lower edge of said opening therein, and a baifle platedisposed in a downwardlyfand ,in-,

wardly inclined relation.to the casing with its upper edge engagedin the angle of said side wall r member constituted by its top panel andjsaid inrclinedpanel having the conduit opening therein,

the lower edge oflthe baiile being engaged with the upper edge of said casing opening, said bailie having outwardly directed flanges on its end edges abutting the interior sides of said side and end walls and secured thereto. V

2. The combination witha hot air furnace cas ing having a cold air inlet'opening adjacent the bottom thereof, of a cold air boot positioned on the outside of said casing comprising a pair of laterally spaced apart similar polygonal shaped end walls flanged at their inner edges for attachment to the side ofthe casing and having complementary opposedflanges on their other edges, said end walls being disposed with their corree sponding edges in parallel relationship and with said opposed flanges facing inwardly toward each other, an integral poly-paneled side wall member including top and bottom panels and intermediate panels, there being an outwardly and'downwardly inclined panel adjacent the top panel and provided with a flanged conduit opening, said side wall member corresponding in shape to the outer edges of said end walls and having inset return bend seam elements on its end edges providing laterally facing slots receiving the opposed flanges of said end walls, said seam elements of said side wall member terminating in laterally projecting flanges foldable upon the exterior sides of said end walls, the top panel of said side wall member abutting the side of the casing in substantially spaced relation to the upper edge of the casing opening, and a baflie plate disposed in a downwardly and inwardly inclined relation with its upper'edge adjacentthe side wall member and at the inner side of the conduit opening therein, the lower edge of the baille being engaged with the upper edge of said casing opening.

3; The combination with a hot air furnace having a cylindrical casing defining a, cold air inlet 4 near the bottom thereof, of a cold air boot positioned on the outside of said casing comprising a pair of laterally spaced apart similar end plates having out-turned vertical flanges secured to said casing and complementary opposed flanges along the other edges thereof, said end walls being disposed with their corresponding edges in parallel relationship and with said opposed flanges facing inwardly toward each other, a body member shaped to conform with the outer edges of said end plates and form a top and bottom section, upper and lower converging sloping sections extending from said top and bottom sections and aside section connecting said sloping sections, said upper sloping section defining an outwardly flanged aperture, the edges of said body member 'i being pressed inwardly of said body member and formed into a return flange and then folded outwardly in the planes of, the main portion of the body member so as toform slots arranged to receive the opposed flanges on said end panels,

the edges of said bodymember being folded over the sides of said end panels,'and a baiile plate positioned in said boot and secured to'said end panels with its upper edge in contact with the body member of said boot adjacent to the junc-' tion between said top section and upper sloping section and sloping downwardly to said casing above said inlet, the free edges of said body memher and baiiie being slit into series of fingers and folded into contact with said casing; The combination with a hot air furnace havinga cylindricaicasing defining a cold air inlet near the bottom thereof, of a cold air boot positioned on the outside of said casing comprising a pair of laterally spaced apart similar end plates having vertical flanges secured to said casing and complementary opposed flanges along the other edges thereof, said end walls being disposed with their corresponding edges in parallel relationship and with said opposed flanges facing in wardly toward each other, a body member shaped to conform with the outer edges of said'end plates and form atop and bottom section, upper and lower converging slopingsections extending from said top andbottom sections and a side section connecting said sloping sections, said upper sloping section defining an outwardly flanged aperture-the edges of said body member being formed into a double return bend forming a slot opening toward the edges of said body member and arranged to receive the opposed flanges on said end panels, the edges of said body member being folded over the exterior sides of said end panels, a bailie plate positioned in said boot with its upper edge spaced from said casing and sloping downwardly to said casing above said inlet, the free edges of said body member and bailie being slit into a series of fingers and folded into engaging contact with said casing.

5 The combination with a hot air furnace having a cylindrical casing defining a cold air inlet near the bottom thereof, of a cold air boot positioned on the outside of said casing comprising a pair of laterally spaced apart similar end plates having vertical flanges secured to said casing and complementary opposed flanges along the other edges thereof, said end walls being disposed with their corresponding edges in parallel relationship and with said opposed flanges facing inwardly toward each other, a body member shaped to conform with the outer edges of said end plates and form a top and bottom section, an upper sloping section extending from said top section and a side section, said upper sloping section degreases fining an outwards fisegedeeertare, the edges of said body member being formed into-adouble return bend forming a slot opening-1 towardthe edges of the bodymemberandreceiving the opposed flarig's' Eifi senses panels, the edges of said member being folded over the exterior or saidendpanels, abaffleplate positioned iii-said test with its upperedge spaced from said easing" and sloping downwardly to said c'a'sing abtit e said inlet. 7 a

6. A boot adapted to be mounted on a hot air furnace having a cylindrical casing defining a cold air intake near the bottom thereof, comprising a pair of laterally spaced apart similar end panels having outwardly turned vertical attaching flanges along their back edges, said end walls being disposed with their corresponding edges in parallel relationship and having opposed flanges along their other edges turned inwardly of the boot, said inwardly turned flanges bein joined with a continuous body member shaped to conform with the outer edges of said end plates and have parallel upper and lower walls, a vertical side wall, and an upper sloping wall, the edges of said body member being folded to form slots receiving said opposed flanges on said end panels, and a baflile plate secured within said boot and spaced at its upper edge from the free edge of said upper wall and sloping downwardly away from said side wall, said sloping wall forming an inlet opening to said boot.

7. A boot adapted to be mounted on a hot air furnace having a cylindrical casing defining a cold air intake near the bottom thereof, comprising a pair of laterally spaced apart similar end panels having outwardly turned vertical attaching flanges, said end panels being joined with a continuous body member shaped to conform with the outer edges of said end plates and have parallel upper and lower walls, a vertical side wall and an upper sloping wall, the corresponding edges of said end panels being arranged in parallel relationship, the edges of said body member and said end panels being joined by a slot and flange joint, and a bafflle plate secured within said boot and spaced at its upper edge from the free edge of said upper wall and sloping downwardly away from said side wall, said sloping wall forming an inlet opening to said boot.

8. The combination with a hot air furnace having a cylindrical casing defining a old air intake near the bottom thereof, of a boot positioned on the outside of said casing consisting of a pair of laterally spaced apart similar end panels having outwardly turned vertical flanges, said end panel's being attached to said casing and being joined with a continuous body member shaped to conform with the outer edges of said end plates and have parallel upper and lower walls and an upper sloping wall, the corresponding edges of said end panels being arranged in parallel relationship, and a baflle plate secured within said boot and spaced at its upper edge from the wall of said casing and sloping downwardly at an acute angle to said upper wall to said casing, the inner free edges of said body member and bafiie being slit into series of fingers bent into engaging contact with said casing, said sloping wall forming an inlet opening to said boot.

9. The combination with a hot air furnace casing having a cold air inlet opening adjacent the bottom thereof, of a cold air boot positioned on the outside of said casing comprising a pair of laterally spaced apart similar polygonalshaped end walls adapted at their inner edge otter edges d walls, there being smut; wardly-"amt downwa d'ly' inciin'ed 'panei provided a flanged 66a opening, a side weir member having seam eieiiientsdn its end-edges receiving the opposdflanges of said end Walls, said seam elements terminating in flanges folded upon the exterior sides of said end Walls, the top panel of said wall member being substantially above the upper edge of the casing opening, the bottom panel having down-turned fingers at its inner edge engaged within the casing at the lower edge of said opening therein, and a baffle plate disposed in a downwardly and inwardly inclined relation with its upper edge engaged in the angle of said side wall member constituted by its top pan-e1 and said inclined panel having the conduit opening therein, the lower edge of the bafille being engaged with the upper edge of said casing opening.

10. The combination with a hot air furnace casing having a cold air inlet opening adjacent the bottom thereof, of a cold air boot positioned on the outside of said casing comprising a pair of laterally spaced apart similar polygonalshaped end walls adapted at their inner edges for attachment to the side of the casing and having complementary opposed flanges on their outer edges, said end walls being disposed with their corresponding edges in parallel relationship and with said opposed flanges facing inwardly toward each other, a poly-paneled side wall member including top and bottom panels and intermediate panels shaped to conform to the outer edges of 7 said end walls, there being an outwardly and downwardly inclined panel provided with a flanged conduit opening, said side wall member having seam elements on its end edges receiving the opposed flanges of said end walls, said seam elements terminating in flanges folded upon the exterior sides of said end walls, the top panel of said wall member being substantially above the upper edge Of the casing opening, and a baffle plate disposed in a downwardly and inwardly inclined relation with its upper edge engaged with said side wall member between said casing opening and said conduit opening, the lower edge of the baffle terminating adjacent the upper edge of said casing opening.

11. The combination with a hot air furnace casing having a cold air inlet opening adjacent the bottom thereof, of a cold air boot positioned on the outside of said casing comprising a pair of laterally spaced apart similar polygonalshaped end walls flanged at their inner edges for attachment to the side of the casing and having complementary opposed flanges on their other edges, said end walls being disposed with their corresponding edges in parallel relationship and with said opposed flanges facing inwardly toward each other, a poly-paneled side wall member including an outwardly and downwardly inclined panel provided with a flanged conduit opening, said side wall member having seam elements on its end edges providing laterally facin slots receiving the opposed flanges of said end walls, said seam elements of said side wall member terminating in laterally projecting flanges foldable upon the exterior sides of the said end walls, the top of said side wall member havin fingers at its inner edge abutting the side 0! the casing in substantially spaced relation to the upper edge of the casing opening, the bottom having down-turned fingers at its inner edge engaged within the casing at the lower edge of said opening therein, and a baflie plate disposed in a downwardly and inwardly inclined relation with its upper edge spaced from said casing, the lower edge of the baflie being engaged with the upper edge of said casing opening.

MER'IUN D. JONES.

REFERENCES CITED The following references are of record in the tile of this patent:

V UNITED STATES PATENTS Number 

